To find two numbers that add up to 21 and multiply to 30, we can set up a system of equations. Let's call the numbers x and y. We have the equations x + y = 21 and x * y = 30. By solving these two equations simultaneously, we can find that the two numbers are 6 and 15.
57
111
421
There are no two real numbers that do, but two complex numbers do: (3.5 + i 3.5 √23) and (3.5 - i 3.5 √23) If you want them to add to 7 and multiply to -294, then the two real numbers -14 and 21 work. Or if you want them to add to -7 and multiply to -294, then the two real numbers 14 and -21 work. To add to -7 and multiply to 294, the following two complex numbers work: (-3.5 + i 3.5 √23) and (-3.5 - i 3.5 √23)
-17
what two factors of -21 add up to -6
21
57
7 & 3
341
The numbers are: -1 and -20
21
-3367
111
The numbers are: 21 and -10
421
99